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JEE Main 2021 B.Arch Question Paper with Answer Keys [September 9, 2021- Afternoon Session]

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Content Curator updated | Updated On - Jan 24, 2023

JEE Main 2021 B.Arch Question Paper and Answer Key for September 9 Afternoon session is available for download. JEE Mains B.Arch questions were distributed in 3 sections i.e. Mathematics, Aptitude, and Drawings. The exam was conducted in both CBT (computer based test) and Pen-paper mode. 180 minutes would be allotted for solving the question paper. Mathematics and Aptitude section to be solved via CBT mode. While the questions related to Drawings were held in Pen-paper mode.

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JEE Main 2021 B.Arch Question Paper- September 9 (Afternoon)

JEE Main 2021 Question Paper	JEE Main 2021 Answer Key
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JEE Main 2021 B.Arch Question Paper: Paper Analysis

A total of 77 questions were listed in JEE Main 2021 B.Arch Question Paper. Kindly refer to the below-mentioned table to get the details of number of listed questions as per the section-

Sections	Question Frequency	Carried Marksh
Mathematics	25	100
Aptitude	50	200
Drawing Related Questions	2	100
Total	77	400

The Mathematics section of JEE Main 2021 B.Arch was a combination of 20 MCQs (Multiple Choice Questions) and 10 Non-MCQs. Candidates were required to attempt only 25 questions out of 30.

As per the determined marking scheme, 4 marks will be rewarded for every correct MCQ and Non-MCQs. Any incorrect MCQ will lead to a reduction by 1 mark. However, no marks will be deducted for the wrong Non-MCQs.

JEE Main 2021 Questions with Solutions

1	According to Bohr's atomic theory :- (A) Kinetic energy of electron is ∝Z²/n². (B) The product of velocity (v) of electron and principal quantum number (n), 'vn' ∝Z². (C) Frequency of revolution of electron in an orbit is ∝Z³/n³. (D) Coulombic force of attraction on the electron is ∝Z³/n⁴. Choose the most appropriate answer from the options given below:
2	Complete combustion of 1.80g of an oxygen containing compound (C_xH_yO₂) gave 2.64g of CO₂ and 1.08g of H₂O. The percentage of oxygen in the organic compound is:
3	Out of the following, which type of interaction is responsible for the stabilisation of ∝ -helix structure of proteins?
4	(A) HOCl + H₂O₂→ H₃O⁺+ Cl⁻+ O₂ (B) I₂+ H₂O₂+ 2OH⁻ → 2I⁻ + 2H₂O + O₂ Choose the correct option.
5	Which of the following equation depicts the oxidizing nature of H₂O₂?
6	Given below are two statements: Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame. Statement II : Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame. In the light of the above statements, choose the most appropriate answer from the options given below.
7	Which of the following reaction/s will not give p− aminoazobenzene?
8	In the given figure, the energy levels of hydrogen atom have been shown along with some transitions marked $A , B , C , D$ and $E$. The transitions $A, B$ and $C$ respectively represent :
9	Four identical particles of equal masses $1 kg$ made to move along the circumference of a circle of radius $1 m$ under the action of their own mutual gravitational attraction. The speed of each particle will be :
10	If an emitter current is changed by $4 mA ,$ the collector current changes by $3.5 mA$. The value of $\beta$ will be
11	Match List -I with List -II
12	Each side of a box made of metal sheet in cubic shape is 'a' at room temperature 'T', the coefficient of linear expansion of the metal sheet is ' $\alpha^{\prime}$. The metal sheet is heated uniformly, by a small temperature $\Delta T ,$ so that its new temperature is $T +\Delta T$. Calculate the increase in the volume of the metal box.
13	A cube of side 'a' has point charges $+ Q$ located at each of its vertices except at the origin where the charge is $-Q$. The electric field at the centre of cube is:

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JEE Main Previous Year Question Papers

Candidates can solve the question papers of the previous year to analyze their performance levels. To enhance the accuracy level, candidates are advised to solve JEE Main Question Papers daily. JEE Main B.Arch year wise and subject wise question paper links with answer key PDFs are provided below:

JEE Main 2021 Question Paper	JEE Main 2020 Question Paper	JEE Main 2019 Question Paper
JEE Main 2018 Question Paper	JEE Main B.Arch and B.Planning Question Papers	JEE Main Mock Test
JEE Main Physics Question Paper	JEE Main Maths Question Paper	JEE Main Chemistry Question Paper

*The article might have information for the previous academic years, please refer the official website of the exam.

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JEE Main 2021 B.Arch Question Paper with Answer Keys [September 9, 2021- Afternoon Session]

JEE Main 2021 B.Arch Question Paper- September 9 (Afternoon)

JEE Main 2021 B.Arch Question Paper: Paper Analysis

JEE Main 2021 Questions with Solutions

JEE Main Previous Year Question Papers

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